Wrench



May 21, 1929. w. H. GOLDSTRAW 1,714,018

WRENCH Filed Aug. 25, 1927 J? 6 Ma 601067, 4

Patented 'May 21, 1-929.

UNITED STATES PATENT oFr-ucs.

WRENCH.

Application filed August 25, 1927, Serial No.'215,450, and in Australia August 28, E26.

This invention relates to an adjustable wrench of improved construction which in use will be found to be highly efficient in maintaining a tight grip on a nut or other work piece required to be rotated.

The improved wrench consists essentially of a fixed jaw, a movable jaw slidablc on said fixed jaw and a lever handle pivoted to the fixed jaw and so connected to the movable jaw that when the wrench is actuated by its lever handle the movable jaw is caused to automatically tighten on the nut or work piece.

. In the accompanying exemplary drawmgs:

Figure 1 is a view in elevation of the improved wrench.

Figure2 is a longitudinal section on the line 2.2 of Figure 3.

.Figure 3 is a cross-sectional viewon line AA of Figure 1.

The wrench comprises a fixed jaw 2 constructed witha downwardly extending shank 3 which slidably supports a movable jaw member 4. The shank 3 is slotted to form two arms 5 which are accommodatedin recesses 6 in the side walls of the movable member 4see Figure 3. 1

'Accommodated in the lower end of the shank 3 is a lever handle 7. which is pivoted to said shank by means'of a removable pin or screw 8 passed through an elongated hole 9 in said lever handle and through one of a series of adjustment holes 10 formed in the arms 5 of the shank.

The lever handle is provided at its upper end with an extension 11 arranged to project into a slot 12 formed in the lower end of the movable jaw member 4. A hole 13 in said handle extension 11 receives a pin or rivet 14,

which is passed through the lower end of the movable jaw member 4 to thus pivotally connect the lever handle thereto.

In use, the aws of the wrench are first adjusted approximately to the size of nut to be turned by inserting the removable pin or screw 8 into a selected one of the adjustment holes 10 in the slotted shank 3. The wrench is then applied to the nut and the lever handle 7 grasped and actuated similarly to the handle of an ordinary wrench. In the initial movement, the lever handle pivotally moves on the pin 8 causing the extension 11 of said handle to slide the movable jaw member 4 upwardly into engagement with the nut. Further operation of the lever handle now tightly closes the jaws upon the flats of the nut and causes the nut to be rotated in the usual manner. Upon relaxing the pressure upon the lever handle 7, the jaws are released from gripping engagement with the nut.

In wrenches, the faces of the jaws 2' and 4 are made straight and are serrated as shown in the drawings to enable a firm grip to be obtained, but in pipe wrenches and like tools the faces of the jaws are preferably curved.

What I do claim is An improved adjustable wrench compris ing a fixed L-shape'd member having a slot extending longitudinally of the long log of said member and dividing said long leg into two sections, the said long leg having a scries of holes therethrough, a jaw face formed on the short leg of said member, a sliding j aw mounted between the sections of the long leg of the L-shaped member, an L-shaped handle having a slot formed in the corner thereof,

the short leg of said handle being pivoted to V the said sliding jaw, and a pin removably connecting the handle with the fixed L-shaped member by passing through said corner slot and any one of the holes in the long leg of the L-shaped member.

In testimony whereof I aflix my signature.

WILLIAM HENRY GOLDSTRAW. 

